The act in which you open an oreo so half of the oreo filler is on one side of the cookie. You will then stick the half of the oreo on an item (cars are ideal) and smudge down. it is important that you leave the half of the cookie on the bottom of the smudge. This should leave a poop stain looking figure.
*this works better when the oreos are warm. it is a good idea to put them in the sun before.*
NOUN-Oreo
VERB-Oreoing
adjective-Oreod